Institute for Color Science and Technology (ICST) Progress in Color, Colorants and Coatings 2008-2134 8 2 2015 05 01 Preparation of Reversible Thermochromic Ink for Flexography Printing on Paper and Study its Colorimetric Properties 159 168 75855 10.30509/pccc.2015.75855 EN M. Khanjankhani Department of Polymer Engineering and Color Technology, Amirkabir University of Technology M. Khatibzadeh Department of Polymer Engineering and Color Technology, Amirkabir University of Technology Journal Article 1970 01 01 Thermochromic printing inks could be security inks which respond to the color change when are being exposed to different temperatures. These inks with unusual chemical and physical specific characteristics are mostly produced for flexographic, screen and rotogravure printing systems under the supervision of skilled technical experts and with precise security controls. Since flexographic thermochromic inks can be used easily for smart packaging including different substrates, in this study a thermochromic ink was prepared with an activation temperature of 31 °C for flexographic printing. The dynamic colorimetric properties were studied during the range of 28-45 °C temperature. TC contrast and yellowness of TC sample were calculated during heating and cooling. https://pccc.icrc.ac.ir/article_75855_a06b241c4b0976495d80d7d717ff4053.pdf